Improved shaft-coupling



CHARLES E. DU VALL, or MILWAUKEE, YvvIscoNs1N- Letters Patent No. 99,657, dated February 8, 1870; antedated February/5, 1870.

nvmnovnn SHAFT-COUPLING.

The Schedule referred t in these Letters Patent and making part ofthe sanne.

'l'o all 11E-hom it may concern:

Be Vit known' that I, CHARLES Ii". DU VALL, of the city and county of Milwaukee, and State of Wiscon sin, have invented a new and useful Improvement in l Shaft-Couplings; and I do hereby declare that the following isla Tull, clear, and exact description thereof,

which will' enable those skilled in tle'art to -makev and use the same, reference being had to the accompanying drawing, forming part lof this specification, in which-, L

Figure I is a view of my invention, with the side broken out; v

Figure 2, a sectional view of the hollow socket; and Figure 3, a sectional view of the inside or solid piece.

. Similar letters of reference, 'in each-of the figures,v

indicate corresponding parts. The object of my invention is to produce a coupling that may be lengthened or shortened, as Icircumstances may require.

A is a square piece, passing into B.

B, the socket, for A 13o-pass into.

C, coupling or knuckle, on one end ofthe piece A.

D, a thimble, on the` end of B, with a square hole, just the right size for A to pass in to.

E, a coupling or knuckle, on the other end of' socket .B.

Operation.. v Shove piece A, through thimble D, into socket B, up as far as may be' necessary-to give it theright length, and couple the' two ends C and E to a sha-ft,

and the coupling is 'readyl for use.

rIhis coupling may be lengthenedout or shoved together, as circumstances may require,'from the short est to the longest distance it may be made. 'v

What I claim as my inventicinand desire to secure byLetters Patent, isf- 1. A coupling, consisting of'v pices A, B, and D,- consiructed substantially as described.

2. A, B', C, D, and E, constructed substantially as described.

CEAS. E'. DU VALL. Witnesses:

'J. B. SMITH,

W.4 M. Hormon. 

